Publications by authors named "Ricky Indra Alfaray"

() is a bacterium known to be associated with a significant risk of gastric cancer in addition to chronic gastritis, peptic ulcer, and MALT lymphoma. Although only a small percentage of patients infected with develop gastric cancer, Gastric cancer causes more than 750,000 deaths worldwide, with 90% of cases being caused by The eradication of this bacterium rests on multiple drug regimens as guided by various consensus. However, the efficacy of empirical therapy is decreasing due to antimicrobial resistance.

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Background: Biofilm formation in () helps bacteria survive antibiotic exposure and supports bacterial colonization and persistence in the stomach. Most of the published articles have focused on one aspect of the biofilm. Therefore, we conducted the current study to better understand the mechanism of biofilm formation, how the biofilm contributes to antibiotic resistance, and how the biofilm modifies the medication delivery mechanism.

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Helicobacter pylori disturbs the stomach lining during long-term colonization of its human host, with sequelae including ulcers and gastric cancer. Numerous H. pylori virulence factors have been identified, showing extensive geographic variation.

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The diverse clinical characteristics of erosive esophagitis (EE) and symptom perception in patients with gastroesophageal reflux disease (GERD) remain a major challenge in understanding their underlying pathogenesis. This study aimed to investigate the association between the levels of IL-8, TNF-α, and IL-17 in serum and the presence of erosive esophagitis and symptoms related to GERD. We enrolled 65 subjects presenting with GERD symptoms.

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The human stomach bacterium Helicobacter pylori, the causative agent of gastritis, ulcers and adenocarcinoma, possesses very high genetic diversity. H. pylori has been associated with anatomically modern humans since their origins over 100,000 years ago and has co-evolved with its human host ever since.

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Background: The prevalence of gastric cancer in Mongolia, in East Asia, remains the highest in the world. However, most strains in Mongolia have a less virulent Western-type CagA. We aimed to determine how genomic variation affected gastric diseases, especially gastric cancer, based on comprehensive genome analysis.

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We conducted a global-scale study to identify antimicrobial-resistant genes (ARG), address their global distribution, and understand their effect on the antimicrobial resistance (AMR) phenotypes of the clinical isolates. We identified ARG using several well-known tools against extensive bacterial ARG databases, then analyzed their correlation with clinical antibiogram data from dozens of patients across countries. This revealed that combining multiple tools and databases, followed by manual selection of ARG from the annotation results, produces more conclusive results than using a single tool or database alone.

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antimicrobial resistance is a critical public health issue. Typically, antimicrobial resistance epidemiology reports include only the antimicrobial susceptibility test results for . However, this phenotypic approach is less capable of answering queries related to resistance mechanisms and specific mutations found in particular global regions.

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Article Synopsis
  • Infection with Helicobacter pylori is linked to gastric cancer and biofilms help protect it from antibiotic treatment, reducing therapy effectiveness.
  • A study involving 56 strains from Bangladeshi patients classified them as 19.6% high-biofilm formers and 81.4% low-biofilm formers, with no specific clade associations found.
  • Significant SNPs in several genes, particularly alpB, were associated with high biofilm formation, indicating their potential role in detecting mutations related to biofilm development.
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Helicobacter pylori is involved in the etiology and severity of several gastroduodenal diseases; however, plasticity of the H. pylori genome makes complete genome assembly difficult. We report here the full genomes of H.

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Dyspepsia still becomes a major challenge in upper gastrointestinal disease in Indonesia. This disease often correlated with Helicobacter pylori infection. However, the prevalence of this bacterium is generally low in Indonesia.

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Article Synopsis
  • A study was done to see how resistant H. pylori bacteria affect the variety of germs in people's stomachs.
  • They tested samples from patients who had symptoms of upset stomach and found different levels of resistance to antibiotics.
  • Results showed that samples resistant to many antibiotics had more diversity in the types of bacteria, while some specific bacteria changed in abundance depending on the resistance level.
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Current management of gastric inflammation involves the eradication of . However, the effectiveness of commonly used antibiotics against infection has decreased due to antibiotic resistance. Phenotypic-based diagnostics are laborious and finding the cause of resistance can be difficult.

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Article Synopsis
  • Helicobacter pylori infection is linked to intestinal metaplasia, but there is a surprisingly low incidence of it in Indonesia, which this study investigates.
  • The researchers analyzed gene expression of proinflammatory cytokines and the characteristics of the East-Asian-type CagA protein to understand its lower virulence compared to Western types.
  • Findings suggest that factors like low H. pylori prevalence, weak inflammatory responses, and less aggressive CagA contribute to the reduced rates of intestinal metaplasia, which is important for understanding risks related to gastric cancer.
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Background: We evaluated the microbiota in the stomach of Gastroesophageal Reflux Disease (GERD) patients. We compared Erosive Reflux Disease (ERD) to gastritis and Non-erosive Reflux Disease (NERD) subjects by 16S rRNA approach on gastric biopsy specimens. A total of 197 subjects were included consisting of gastritis (68; 34.

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Purpose: Histopathology method is often used as a gold standard diagnostic for infection in Indonesia. However, it requires an endoscopic procedure which is limited in Indonesia. A non-invasive method, such as C Urea Breath Test (UBT), is more favorable; however, this particular method has not been validated yet.

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Although millions of people have been infected by (), only a small proportion of infected individuals will develop adverse outcomes, ranging from chronic gastritis to gastric cancer. Advanced development of the disease has been well-linked with chronic inflammation, which is significantly impacted by the adaptive and humoral immunity response. From the perspective of cellular immunity, this review aims to clarify the intricate axis between IL-17, IL-21, and IL-23 in -related diseases and the pathogenesis of inflammatory gastrointestinal diseases.

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